4.5 miles to 5.5 miles - 500 to 600ft Elevation Gain - Moderate Difficulty - 2.5 MPH pace - Call or Email: Mark, QuistAdventures@gmail.com, 516-672-9853. Come hike through the hilly northern end of the Nassau-Suffolk Greenbelt Trail as we move through Cold Spring Harbor State Park and Uplands Farm Sanctuary before our annual membership meeting next door, at the Cold Spring Harbor Library, at 11 AM. We will meet in the parking lot of Cold Spring Harbor State Park, by the trailhead signage. All levels of hikers are welcome! Address: 95 Harbor Road, Cold Spring Harbor NY 11724. Hike end time is approximate.